protein
Any of a class of nitrogenous organic compounds that have large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, etc., and as enzymes and antibodies.
The workhorses of the cell, performing a vast array of functions including structural support, transport, signaling, and catalyzing reactions (as enzymes).
Word relationships
- polypeptide: More technical term for a chain of amino acids, often used interchangeably with protein, though proteins are typically larger and folded.
- macromolecule: Broader category of large biological molecules, including nucleic acids and carbohydrates.
Collocations
- dietary protein
- muscle protein
- protein synthesis
- protein structure
- protein folding
Example sentences
- "Collagen is a vital protein that provides structural integrity to skin, bones, and connective tissues." Explaining its structural role.
- "From muscle contraction to immune defense, proteins are involved in nearly every biological process within an organism." Referring to its functional diversity.
Memory hook
'Protein' is 'PRO' at being the 'teen'y building block of life. Primary building block.
When not to use
While 'protein' is a common dietary term, in biology, it refers to the complex macromolecule with specific functions, not just a nutrient group.
Fun facts
- The human body can produce thousands of different types of proteins, each with a unique 3D shape and function.
- Spider silk is one of the strongest known natural protein fibers.
Also appears in
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